Research on enhancing the hydrophobicity of epoxy surface by plasma treatment with jet low temperature plasma power supply

• Categories:Company Dynamics
• Author:Plasma cleaning machine-CRF plasma plasma equipment-plasma surface treatment machine manufacturer-chengfeng intelligent manufacturing
• Origin:
• Time of issue:2021-09-17
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(Summary description)Research on enhancing the hydrophobicity of epoxy surface by plasma treatment with jet low temperature plasma power supply: The surface condition of insulating materials is one of the important factors that determine the size, performance and stability of power equipment. Insulating materials in a high-voltage electric field are prone to flashover discharge along the surface, and the flashover voltage is much lower than the breakdown voltage. How to increase the surface flashover voltage of insulating materials and effectively suppress the occurrence of flashover is a problem that has been working hard to solve. Improving the surface hydrophobicity of insulating materials is an effective way to increase wet flashover and pollution flashover voltage. At present, measures such as silicone oil, silicone grease (RTV), silicone rubber coating and nano-material filling are mainly used to improve the hydrophobicity of the insulating material surface, but these measures have poor coating adhesion, poor uniformity, poor timeliness, and high maintenance costs. shortcoming. Therefore, on the basis of not affecting the insulation performance of the substrate, forming a uniform, dense and long-lasting hydrophobic layer on the surface by new means can effectively overcome these shortcomings and better improve the surface performance of the insulating material. Plasma treatment with jet low-temperature plasma power supply is one of the new methods to change the surface properties of materials, and it has received extensive attention in recent years. The plasma surface modification of the low-temperature plasma power supply is a dry process, which is highly energy-efficient and pollution-free. The modification only involves the surface nanometer range, and the performance of the matrix is ​​not affected. Among the many discharge forms that generate atmospheric pressure low-temperature plasma, the plasma jet developed in recent years is an ideal plasma source for surface treatment of materials. This discharge form separates the discharge generation from the treatment area through the airflow, and has greater processing flexibility. And controllability, it is very suitable for processing large-size and complex-shaped insulating material surfaces. However, the current research on using jet low-temperature plasma power to improve the water repellency is mainly for typical polymer and metal surfaces, and less involved on the surface of insulating materials. The reason for the increase in water repellency caused by the jet low-temperature plasma power source is that with the increase of processing time, the surface energy dispersion component increases slightly, while the polar component decreases sharply with the increase of processing time. Caused by the reduction of the polarity component. The surface of the untreated epoxy has no obvious features, and the surface is relatively rough. The treated epoxy surface showed a specific morphology, and a uniformly distributed dense network structure was formed on the surface, indicating that the jet low-temperature plasma power plasma treatment formed a new material with a fixed morphology structure on the surface. The jet low-temperature plasma power plasma treatment can effectively improve the hydrophobicity of the epoxy surface. As the treatment time increases, the water contact angle of the epoxy surface increases and the surface energy decreases after treatment. The particles of Ar, OH, O and Si contained in the jet interact with the epoxy surface to form a dense network structure on the surface. At the same time, silicon-containing groups are introduced on the surface to effectively reduce the surface polarity and make the epoxy The hydrophobicity of the surface is improved.